What pads fit in the StopTech ST-40 caliper?
The StopTech ST-40 caliper is designed to use a pad from various Porsche models including the 944 Turbo, 1991-1994 911 series, 1992 968 and 1986-1991 928. Numerous manufacturers make different compounds from street to full race applications for this pad shape. The Friction Materials Standards Institute (FMSI) establishes a numbering system for pad shapes in virtually every vehicle sold in North America so that cross referencing the various OE part numbers can be vastly simplified. Some pad manufacturers have a cross reference between their numbering system and the FMSI number, but others still do not provide such a tool. The FMSI number for the pad used in the StopTech ST-40 caliper is D372. Over the years, Porsche has consolidated certain pads with slightly different backing plate shapes. Though these pads that Porsche consolidated will all fit in a Porsche caliper, they will NOT all work in the ST-40 due to the tighter tolerances of our bridge and pad retaining system. Other FMSI num
